Rotork’s Variable Speed Drive (VSD) provides a high response rate and stable control with minimal overshoot. Rotary and linear versions enable the operation of part-turn valves, globe valves, and dampers. Fail-in-place or failsafe open/close options are available. Positional accuracy is < 0.1% with repeatability < 0.1% of full stroke. A wide range of status, alarm, and input/output signals can be configured with parameters stored in non-volatile memory. Linear thrust outputs are from 2,000 to 100,000 lbs and rotary torque outputs are from 2,000 to 300,000 lbf-in. The control enclosure is available with NEMA 4X and NEC Class 1, Division 1 ratings.